MATHEMATICS
TOOLS [XI]
1. Simplify :
a. (2x - 5)3 b. (2x
- 1)5 c. (x - 1)4 .
e. (2x + 5)5 f. (x + 5)7 g. (x/3 - 5)2
h. ( x + 2/5)3 i. (2/x
- 2)3 j. (x/2 - 1)3
2. Simplify
:
a.
b.
c.
d.
3. Factories :
a. x2 - 7x + 12 =
0 b. 2x2 - 5x - 12 =
0
c. 8x2 - 4x - 4
= 0
d. 2x2 + 3x - 9 = 0
4. Solve
at 3 decimal place :
a. (1001)1/3 b. (102)1/2
c. (10002)1/4 d. (1005)1/3
e.
, x =
0.001 f.
, x 0=
.002
g.
x
= 0.003
h.
x = 0.005
5.
prove that
a. 4 log 3 + 3 log 9 = 10 log 3
b. 3 log 2 + 2 log 3 = log
72
c. log 1 + log 2 + log 3 =
log (1+ 2+ 3 )
d. 2 log 5 – 5 log 2 = log (25 /
32)
e. 3 log 7 – 2 log 2 - 3 log 3 = log (343 / 324)
6.
find dy / dx :
a. sinx
+ cosx b. cos + 3 tanx
c.
cosec -1/2 sinx d.cos x/2 – 3sinx/9
e.cot x/2 – cosec x/7 f.
sinx
g. cot x/3 – sinx2x h.
sec x3 + cot2x