1
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

If a$$\in$$R, b$$\in$$R, then the equation x2 $$-$$ abx $$-$$ a2 = 0 has

A
one positive root and one negative root
B
Both positive roots
C
Both negative roots
D
Non-real roots
2
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

The solution of the inequality $${4^{ - x + 0.5}} - {7.2^{ - x}} < 4$$, x $$\in$$R is

A
$$( - 2,\infty )$$
B
$$( 2,\infty )$$
C
$$\left( {2,{7 \over 2}} \right)$$
D
None of these
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