Question # 1

A sequence having no last term is called

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arithmetic sequence

Geometric sequence

Finite sequence

Infinite sequence

The sum of co-efficient in (1+x-3x²)⁴¹⁶³is

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0

1

-1

None

If 4 ⁶P_r= ⁶P_r+1, then r is equal to

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4

3

2

1

If x, y, z are the pth, qth, rth terms of an A.P. and also of G.P., then x^y-z. y^z-x. z^x-yeqals

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xyz

0

1

None of these

w¹⁵= ______

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0

1

w

w²

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In R the number of identity elements w.r.t.'.' is

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One

Two

Three

Four

A person standing on the bank of a river observes that the angle of elevation of the top of a tree on the opposite bank of the river is 60° and when he retires 40 meters away from the tree the angle of elevation becomes 30°. The breadth of the river is