The value of 4x2y+7x+2, when x=2 and y=1 is ___.
28
32
40
15
∵ x=2, y=1
∴4x2y+7x+2=4(2)2×1+7(2)+2
= 16+14+2 = 32
Two adjacent angles of a parallelogram are (2x+25)∘ and (3x−5)∘. The value of x is
(a) 28 (b) 32 (c) 36 (d) 42
If f(x) = (1 + x) (1+x2)(1+x3), then f'(1) =
The maximum value of Z=x+y,subject to:2x+y⩽50,x+2y⩽40,x⩾0,y⩾0 is