Question 4i Find 2-5-1-2

Name: NCERT - Grade 07 - Mathematics - Fractions and Decimals - Q28_1
Uploaded: 2022-07-04T10:36:42+05:30
Description: 2/5÷1/2 = 2/5×2/1 = 2 × 2/5 × 1 = 4/5 ...

2/5÷1/2 = 2/5×2/1 = 2 × 2/5 × 1 = 4/5 ...

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Standard VII

Mathematics

Integers

Question 4i F...

Question

Question 4(i)
Find
$\frac{2}{5} \div \frac{1}{2}$

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Solution

$\frac{2}{5} \div \frac{1}{2} = \frac{2}{5} \times \frac{2}{1} = \frac{2 \times 2}{5 \times 1} = \frac{4}{5}$

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(\frac{1}{1 - 4 i} - \frac{2}{1 + i}) (\frac{3 - 4 i}{5 + i})

to the standard form.

Reduce $[\frac{1}{1 - 4 i} - \frac{2}{1 + i}] = [\frac{3 - 4 i}{5 + i}]$ to the standard form.

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\sqrt{\frac{2 + 3 i}{5 - 4 i} + \frac{2 - 3 i}{5 + 4 i}} = a + i b

then

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Integers

Standard VII Mathematics

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Question 4(i) Find 25÷12

25÷12=25×21=2×25×1=45

Question 4(i)
Find
$\frac{2}{5} \div \frac{1}{2}$

$\frac{2}{5} \div \frac{1}{2} = \frac{2}{5} \times \frac{2}{1} = \frac{2 \times 2}{5 \times 1} = \frac{4}{5}$