Find the sum of the first five terms of the G.P 2,6, 18 ....
484
243
242
130
121
Correct answer is C
\(S_{n} = \frac{a(r^n - 1)}{r - 1}\)
a = 2; r = 6/2 = 3.
\(S_{5} = \frac{2(3^5 - 1)}{3 - 1}\)
= \(243 - 1 = 242\)
70o
84o
96o
156o
168o
Correct answer is B
\(2\pi r = 2 \times 3.142 \times 15 = 94.28cm\)
\(94.28cm = 360°\)
\(1cm = \frac{360°}{94.28}\)
\(\therefore 22cm = \frac{360°}{94.28} \times 22\)
= 84°
Find the values of x for which y = 5
-2.5, 2.0
-2.6, 2.1
-2.0, 1.5
-2.0, 2.0
0, 0
Correct answer is B
No explanation has been provided for this answer.
From the graph determine the roots of the equation y = 2x2 + x - 6
-3, 4
-2, -6
-2, 1.5
-1, 1
2, 1.5
Correct answer is C
No explanation has been provided for this answer.
Find the 4th term of an A.P, whose first term is 2 and the common difference is 0.5
0.5
2.5
3.5
4
4.5
Correct answer is C
\(U_{n} = a + (n - 1)d\)
\(U_{4} = 2 + (4 - 1) \times 0.5\)
= \(2 + 1.5\)
= 3.5
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