Hard Math Class 9 Level 1

What is the correct form after rationalizing 1/(√7 - √5)?

1/(√7 - √5) का हर परिमेय करने पर सही रूप क्या होगा?

A (√7 + √5)/2 / (√7 + √5)/2 B (√7 - √5)/2 / (√7 - √5)/2 C √7 + √5 / √7 + √5 D 2/(√7 + √5) / 2/(√7 + √5)
Show answer and explanation
Correct Answer

A. (√7 + √5)/2 / (√7 + √5)/2

Explanation

Multiplying by the conjugate makes the denominator 7 - 5 = 2 so the answer is (√7 + √5)/2.

संयुग्मी से गुणा करने पर हर 7 - 5 = 2 हो जाता है इसलिए उत्तर (√7 + √5)/2 है।

Related Questions

Easy Math Class 10 Level 1

What is the HCF of 24 and 36?

24 और 36 का महत्तम समापवर्तक क्या है?

A 12 B 6 C 18 D 24
Answer and explanation locked 🔒

Tap once to confirm. On the next tap, login will open for the answer.

Easy Math Class 10 Level 1

What is the mean of the numbers 2 4 6 and 8?

संख्याओं 2 4 6 और 8 का माध्य क्या है?

A 4 B 6 C 8 D 5
Answer and explanation locked 🔒

Tap once to confirm. On the next tap, login will open for the answer.

Easy Math Class 10 Level 1

What is the area of a circle with radius 7 cm when π = 22/7?

7 सेमी त्रिज्या वाले वृत्त का क्षेत्रफल कितना होगा जब π = 22/7 हो?

A 44 सेमी² / 44 cm² B 77 सेमी² / 77 cm² C 154 सेमी² / 154 cm² D 308 सेमी² / 308 cm²
Answer and explanation locked 🔒

Tap once to confirm. On the next tap, login will open for the answer.

Easy Math Class 10 Level 1

What is the value of sin 30°?

sin 30° का मान क्या होता है?

A 1/2 B √3/2 C 1 D 0
Answer and explanation locked 🔒

Tap once to confirm. On the next tap, login will open for the answer.

Student Class Required

Select your class first

Quiz questions, daily challenge and practice pages will open according to your selected class.