MCQ
Find sum of series 2 + 3 + 5 + 7.
- A5
- B10
- C17
- Dinfinte
Solution:
Sum of the series 2 + 3 + 5 + 7 is finite because given series has finite number of terms.
The sum of given 4 terms i.e. 17.
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|z1 + z2| = |z1| + |z2| is possible if:
$\text{z}_2=\bar{\text{z}_1}$
$\text{z}_2=\frac{1}{\text{z}_1}$
$\arg(\text{z}_1)=\arg(\text{z}_2)$
$|\text{z}_1|=|\text{z}_2|$
Seven white balls and three black balls are randomly placed in a row. The probability that no two black balls are placed adjacently equals:
The tangent of angle between the lines whose intercepts on the axes are a, -b and b, -a respectively, is: